Type-writing machine.



No.' 7|2,933. y Pafented Nov. 4, i902.

H. JARvls & M. H. BLAKESLEE.

TYPE WRITING MACHINE.

(Application filed May 16, 1898. Renewed Nov. 14, 1901.)

(No Model.) 7 SheeIs-Shee I.

III

" "man" Patented Nov. 4, |902. H- Jlmvls & M. H. BLAKESLEE.

TYPE` WRITING MACHINE.

' (Application led May 16, 1898. Renewed Nov. 14, 1901,)

7 Sheets-Sheet 2.

(No Mndel'.)

"140. 7|2,933. Patented Nov. 4, |902'.

` H. JARVIS & M.- H. BLAKESLEE.

TYPE wmTmG MACHINE.

(Auulication led May 1B; 1898. Renewed Nov. 414, 1901.) (No Model.) 7Sheets-Sheet 3.

No. 7I2,933.

Patented Nov. 4, |902. H. J'ARV'IS & M. H. BLAKESLEE.

TYPE wIIITIIIG MACHINE.

(Applica'tion med my 1e, 189s. mnewed Nov. 14, 1901.)

(No Model.)-

7 Sheets-Sheet 4.

TH: Norms Pinus co. Puonumo.. wAsHmsYomp. I:y

no. 7|2,933..` K Patented Nov.4,"|902. lH. JAvls & M..H. BLAKESLEE...

TYPE WRITING MACHINE. Y (Application mea my 1e, mms. mnewea Nav. 114,1901.1 (nq Model.) 7 sheets-sheet `-5.

Y No. 7|2,93s. 'Patented Nov. 4,1902. H. JAnvls & M.A H. BLAKESLEE.

TYPE WRITING MACHINE., (Appliatio tiled May 16,41898. Renewedl Nov. 14,1901.)

75mm-sheet s. v

LeSsC-.TS ZM f Unirse Freres Artnr Ormes.

HAROLD .IARVIS AND MANLEY I-I. ILAKESLEE, OIF BUFFALO, NEVV'YORK,ASSIGNORS, BY MESNE ASSIGNMENTS, TO JARVIS TYPE WRITER AND TABULATORCOMPANY, OF BUFFALO, NEW YORK.

,TYPE-WRITING MACHINE. I l

SPECIFICATION forming part of Letters :Patent No. 712,933, datedNovember 4, 1902. Application led May 16, 1898. Renewed November 14,190].. Serial No. 82,249. (No model.)

double type are mounted on ba'r's'arranged infv the form of a circularbasket and in which the platen has a longitudinal and a transversemovement with reference to the printing-line; so that either of the-typeon a bar may be brought to the printing-line. Some parts of l ourimprovements are also applicable to other styles of type-writingmachines.

The objects of our invention are to sim-4 plify the construction of thedevices whereby the platen is supported and moved 4trans-v versely tothe printing-line and the devices whereby the platen is rotated, toimprove-the construction of the guide which supports theplaten-carriage, and to provide an efficient locking device whereby thekey-levers are prevented from being operated when the platen has nearlyreached the end of a line.

In the accompanying drawings, consisting of seven sheets, Figure 1 is afragmentary top plan View of our improved type-writing machine. Fig.Zeis a perspective View of the platen supporting and shifting mechanism:Fig. 3 is a fragmentary longitudinal sectioni on an enlarged scale, inline 3 3, Fig. 1, showiing the position of part-s before the key-lockingmechanism is operated by the carriage. Fig. 4 is a perspectiveview ofthetappet whereby the key-locking mechanism is operated. Fig. 5 is afragmentary perspective view ofthe machine looking from the rear andshowing the mechanism whereby the keys are locked. Fig. 6 is a sectionalside elevation of the mechanism for turning the platen, the partsbeingadjustedfor turning the platen one tooth or space at a time. Fig. 7is a similar View of the platen and its shifting mechanism and one ofthe type-bars and its operating mechanism, the platen-shifting mechanismbeing adjusted for turning the platen two spaces or teeth at a time.Fig. 8 is a fragmentary horizontal section in line 8 8, Fig. 7. Fig. `9is a detached perspective View of the ball-bearing guide of theplaten-carriage. Fig. 10 is a transverse section thereof in line 10 10,Fig. 9. Fig. 11 is a fragmentary longitudinal section thereof in line 1111, Fig. 10. lar to Fig. 10, showing a modified construction of theballbearing guide of the platencarriage. Fig. 13 is a fragmentaryperspec- -tive view of the key-lever-lockin-g mechanism.

Fig'. 14 is a fragmentary vertical section of the lower portion of themachine, showing the locking mechanism in its operative po- Fig. 12 isatransverse section simisition and holding the key-levers against de- Y-the base and top plate.

B represent-s the cylindrical platen, which is movably supported abovethe top plate of 'the frame and which supports the paper on its lowerside during the operation of writing on the same.

C represents one of the type-bars pivoted on the top plate below theplaten and prolvided at its outer end with two. printing types orcharacters c c and adjacent to its pivot with a crank c2.

D represents one of the key-levers, which is connected with the crank ofthe type-bar by a rod d for operating the type-bar and which is arrangedlengthwise in the lower portion of the frame. The key-lever is pivotedat ils rear end and provided at its front end with a button orfinger-piece d and is yieldingly held in an elevated position by aspring cl2.

All of the foregoing parts may be of any suitable or well-knownconstruction.

The platen, as usual, is moved forward intermittently lengthwise of theprinting-line as the writing progresses and also transversely to theprinting-line to permit either of the types on the type-bar to strikethe paper on the platen at the printing-point. The improved mechanismwhereby this movement of the platen is effected is constructed asfollows:

E represents a primary or longitudinallymovable carriage,which consists,essentially, of a longitudinal rod or bar e and tworearwardly-projecting cross-bars c e2, connected with the ends of thelongitudinal bar.

F represents the secondary or transverselymovable carriage,whichconsists, essentially, of two longitudinal barsffand two crossbars f2f3,connecting the ends of the longitudinal barsff'. The platen is arrangedlengthwise in the secondary carriage, and the ends of the platen-shaftI) are journaled in bearings f1 in the cross-bars of the secondarycarriage and pass through horizontal slots f5 in the cross-bars of theprimary carriage, so that the secondary carriage is coinpelled to movelengthwise with the primary carriage, but is capable of movingtransversely independent of the primary carriage. The shaft of theplaten is relieved from frictional contact with the cross-bars of theprimary carriage by means of rollers g, mounted on said shaft andrunning on ledges or tracks g on the outer sides of the cross-bars e e2.

g'2 is a link which connects the front portion of one of the cross-barsof the longitudinally-movable carriage with the adjacent cross-bar ofthe transverselymovable carriage and whereby the platen is held againstturning out of alinement during the transverse lnovenlentof thesecondary carriage in the primary carriage. The platen is caused to movetransversely back and forth uniformly throughout its length by alongitudinal rock-shaft H', journaled in bearings or sleeves h on therear ends of the cross-bars of the primary carriage and provided at itsends with rock-arms 7L It', which are connected by links h2 h2 withopposite ends of the platen-shaft.

I, Figs. l, 2, and 5, represents a shiftingarm whereby the secondarycarriage and the platen mounted thereon are moved transversely. This armis provided at its upper end with an upwardly-opening fork vl, whichreceives the front longitudinal bar f of the secondary carriage and issecured with its lower end to a horizontal rock-shaft i', which isjournaled in the front posts of the frame lengthwise of the carriages.

f1? is a spring which connects a forwardlyprojecting arm i3 on therock-shaft t" with a rod f4, forming part of the main frame. This springturns the shaft and its forked arm in the direction for moving thesecondary carriage and platen forwardly and holds these parts yieldinglyin the foremost position, in which position the printing-point of theplaten isin line with one ofthe types of each type-bar.

J represents a horizontal shiftingrod,which is guided in the frontportion of the top plate, as shown in Figs. 1 and 5, and which ispivoted at its rear end to the forked arm and provided in front rof saidplate with a button or finger-piece j. Upon pushing this shiftingrodbackwardly the secondary carriage and the platen are moved rearwardlyand the printing-point of the latter is carried into line with the othertype of each type-bar. The transverse movement of the carriage islimited by the engagement of the platen-shaft b with the ends of theslots f5 in the cross-bars e' e2 of the primary carriage, as shown inFigs. 2 and 16. Upon lifting the carriages for inspecting the writing onthe under side of the platen the front longitudinal bar of the secondarycarriage is disengaged' from the forked rock-arm I, and upon loweringthe carriages said longitudinal bar is again engaged with the forkedarm. Vhile the carriages move lengthwise as the writing progresses, thefront longitudinal bar of the secondary carriage slides lengthwisethrough the forked arm, so that the platen can be lifted in any positionof the carriages.

The primary carriage is supported on its front side by a roller le,which is. pivoted on the longitudinal bar e on the front side of theprimary carriage and which runs on a track 7c', arranged on the topplate. The rear portion of the primary carriage is supported and guidedin its longitudinal-movement by a guide arranged in rear of thecarriages and consisting of a longitudinally-movable guidecase L and asupporting or guide rail L'. The latter is secured upon the top plate inrear of the carriages and lengthwise thereof and is provided with twolongitudinal ball-grooves ZZ in its opposite vertical sides. Theguidecase consists of a plate Z', arranged above the guide-rail, and twolongitudinal anges Z2 Z3, depending from the plate. These flanges arearranged on opposite sides of the guiderail and are provided withball-grooves Z4 Z4 on their inner sides, which face the ball-grooves ofthe guide-rail.

Z5 represents balls arranged between the grooves in the guide-rail andthe grooves in the guide-flange, a pair of these balls being preferablyarranged between each groove in the rail and the adjacent iiange. Thegrooves in the rail are so constructed that the balls engage with thesame near their axes, and the grooves in the anges are so constructedthat the balls engage With the balls more remote from the axis, whichcauses the balls as they are turned by a considerable movement of theguide-case to roll on the guiderail only a small extent, therebypermitting of employing a comparatively short guiderail. One of thedepending flanges is made IIO integrally with theplate of theguide-case, while the other is ad justably connected therewith by screwsZ6, passing through slots Z7 in the plate, whereby any Wear may be takenup. The balls on each side of the rail are held apart so as lto properlysupport the guide-case on the rail by a separating rod or bar Z8,provided at opposite ends with eyes Z9, which loosely embrace the Vballsof eachpair. The balls are prevented from escaping from the ball-groovesby means of stops or screws Z10 Z11,arranged on the guide-rail and flanges at the ends of the ball-grooves therein. The guidecase is providedon its front side with two forwardly-projecting ears or lugs Z12, inwhich the sleeves Zz of the primary carriage turn, and therebypivotallyconnect the carriage with the guide, so as to permit bothcarriages to be raised for inspecting the writing. Each of these vlugsZ12 consists of an inner section Z13, which is fixed on the guide L, andan outer section Z11, which is attached by screws Z15 to the o uter sideof the inner section, as shown in Figs-l and 16. The sections Z13 Z14 ofeach lug Z12 are provided with coinciding circular openings Z16 Z17,respectively, through which the rock-shaft H passes. y The opening inthe outer section is larger than the opening in the inner section,thereby forming an outwardly-facing shoulder Z11S between the sections,as shown in Fig. 16. The adjacent bearing-sleeve Zt of the primarycarriage Ais journaled in the opening of the outer lug-section and bearswith its inner end against the shoulder Z111. The opening Z1(i intheinner section is larger than the diameter of the rockshaft H, so thatthe latter does not engage therewith. The two bearing-sleeves h byengaging with the outer sides of the inner lugsectious Z13 compel theprimary carriage and guideL to move together. This means of p ivotallyconnecting the primary carriage with the guide L andjourualing therock-shaft H permits the carriages to be freely raised and loweredwithout affecting the Vmechanism whereby the platen vis shiftedtransversely, and it also leaves theshaft H perfectly free from anypressure or weight, thereby permitting the same to turn easily forshifting the platen transversely. This construction of a ball-bearingguide holds the platen securely in place and reduces the wear upon theguide to a minimum, thereby insuring proper alinement of the platen. Y

Instead of arranging theA plate which connects the guide-flangeson topofthe guiderail, as shown in Figs. 9, 10, and ll, thisconnecting-plate maybe arranged on the lower side of the guide-rail, ,iny which constructionthe case is secured to the top plate of the main frame and theguide-railis connect-ed with the4 primaryicarriage, as shown in Fig. 12. Thismeans ofrsupportiug and shifting v the platen and connecting parts isextremely simple and light, owing to the small number of parts,therebypermitting the machine to be operated with greater ease andspeed.

The mechanism whereby the platenY is rotated andheldpin its shifted`position is constructed as follows:

M represents a ratchet-wheel secured to the platen or its shaft, and mis a ratchet-lever provided with a pawl m', which is pivoted to theupper arm m2 of the ratchet-lever and which is adapted to engage withVthe ratchet-wheel for turning the platen. This ratchet-lever is pivotedon the secondarycarriage and is normally turned backward for disengagingits pawl from the ratchet-Wheel by the preponderating weight of thelower arm m3 of the ratchet-lever, this backward movement of the leverbeing limited by the adjacent longitudinal bar e of the primarycarriage, with which the lowerarm m3 engages. The ratchet-lever m may be pivoted to any suitable or convenient part of the secondary carriage,the same as shown in the drawings, Figs. 1, 6, 7, and 16, being pivotedto the paper-guide-supporting rod M', Vwhich is mounted on the secondarycarriage in front of the platen. Upon raising the lower arm of theratchet-lever the pawl on itsv upper arm engages with the adjacent toothof the ratchet-wheel and turns the platen until the forward movement ofthe ratchet-lever is arrested, whichis preferably effected by a stop m4,secured to the upper arm m2 and engaging with the adjacent tooth of theratchetwheel. For the purpose of varying the turning lof the platen andthe space between the lines of writing thelposition lof the ratchetpawlis adjusted so that a greateror less amount of dead movement of the pawlisproduced during the first portion ofl the forward stroke of thelatter, thereby varying the eX- tent of the effective or last portion ofthe forwardmovement of the pawl. ArThe position of the pawl iscontrolled byan adjusting-lever n, which is pivoted on the upper arm oftheA ratchet-lever and provided on its rear arm with a finger or stopn", which engages with theunder side of the pawl. The pawl is yieldinglyheld in engagement with the stop by a spring n2. Upon turning theadjusting-lever so that the stop n and the pawl resting thereon areraised considerably, as shown in Figli, the pawl upon being carriedforwardly by the ratchet-lever moves dead or idle a considerable portionof its forward movement before it engages with va tooth of theratchet-wheel, this dead or idle movementV being so determined thatf-thepawl after engaging with the ratchet-tooth can only turn the platen theextentof one tooth or space during the effective or last portion of itsforward movement. Upon turningtheadjusting-lever so that the stop 'n'and the pawl resting thereon are lowered, as shown in Fig. 7, the extentof the idle portion of the ratchet-lever is reducedl and the pawlengages a tooth of' the` ratchet-wheel, which is arranged two spaces inadvance of the stopping-point, so that the.

platen during the last portion of the forward movement of theratchet-lever is turned the IOO IIO

extent of two teeth or spaces. The pawl when in its retracted positionrests on the stop n' and is wholly disengaged from the ratchet-wheel;but in its projected position the pawl engages with the ratchet-wheeland is wholly disengaged from the stop n. The adj usting-lever ispreferably held in its adjusted position by a depending spring plate orlug n3, formed on the adjusting-lever and provided with two notches orrecesses n4, as shown in Fig. 8, either of which may be engaged with aprojection a5 on the ratchet-lever. Upon turning the adjusting-leverwhen the projection engages with one of its notches the spring-plate isdeflected until the next notch reaches the projection,when the plateagain springs back and holds the adjusting-lever in its shiftedposition. .As the pawl of the ratchet-lever is wholly disengaged fromthe ratchet-wheel when the ratchet-leveris retracted, the platen can beturned freely backward or forward by means of the thumb-pieces orbuttons n at the ends of the platen-shaft for the purpose of makingcorrections or interlineations in the writing.

The platen may be yieldingly held against turning by a detent device ofany suitable and well-known construction. The detent device shown inFigs. l, 6, 7, and 17 consists of an elbow-lever o, pivoted to an upwardextension of the side bar f2, so as to swing in a vertical plane. Theupper arm of this lever projects horizontally inward and is providedwith a roller, which is yieldingly held in engagement with the teeth ofthe ratchet-wheel by a spring o', secured to the cross-barf2 and bearingagainst the lower depending arm of the elbow-lever O.

P represents the spring-drum,which is connected by a strap p with theguide-case L and whereby the carriages and connecting parts are movedforward.

Q Q represent the toothed bar and the pawls, respectively, of theescapement mechanism, whereby the intermittent forward movement of thecarriages and platen is controlled and which may be of any suitable andwell-known construction. The toothed escapement-bar is arrangedlengthwise in rear of the ball-bearing guide and is provided with twoforwardly-projecting arms q q, which are pivoted to ears q q on the rearside of the ball-bearing case, so that the escapement-bar can be raisedout of and lowered into engagement with the escapementpawls. Theescapement-bar is yieldingly held with its teeth in engagement with oneof the escapement-pawls by a spring q2.

Q3 is a shifting-lever, whereby the escapement-bar is lifted out ofengagement from the escapement-pawls at the same time that the platen isturned forward preparatory to moving the platen for beginning a newline. This shifting-lever is pivoted on one of the crossbars of theprimary carriage and is arranged with its front arm Q4 over the lowerarm of the ratchet-lever, while its rear arm Q5 is arranged on an arm q,which projects from the escapement-bar in front of the pivot thereof.When the platen has nearly reached the end of a line, the key-levers areprevented from being depressed by a locking mechanism, which isconstructed as follows:

R is a locking bar or plate, which is arranged transversely underneaththe front portions of the key-levers and which is pivoted at its endsnear one of its longitudinal edges to the base of the main frame, sothat the locking-bar can swing in a vertical plane. Until the platen hasnearly reached the end of the line the locking-plate stands in ahorizontal position, as shown in Fig. l5, which leaves an unobstructedspace below the keylevers and permits the same to be depressed forwriting. When the platen has nearly reached the end of the line, thelocking-bar is automatically turned into a vertical position, so thatits outer or free longitudinal edge stands close to the under side ofthe key-levers, as shown in Fig. 14, whereby the keys are prevented frombeing depressed.

r is a spring which constantly tends to turn the locking-plate into itsraised or operative position.

S represents a main retaining-catch, whereby the locking-plate is heldin its depressed or inoperative position and which is pivoted to abracket s on the base so as to swing in a horizontal plane. This catchis provided at its front end with a dat under side s/ and an inclinedupper side s2 and is yieldingly held in the path'of the locking-plate bya spring s3.

T represents a trip-lever, which is turned by a tappet U on theescapement-bar or some part connected with the carriage and whereby themain catch is released from the lockingplate. portion of the top plateadjacent to the escapement-pawls, so as to swing inV a vertical plane,and its movement is transmitted to the main catch by any suitable means,the means shown in the drawings consisting of an upper arm t of thetrip-lever and turns the same in the direction for disengaging the mainretaining-catch from the locking-piate,\vl1e1eby the latteris releasedand is free to be raised by a spring rinto its operative position,thereby preventing the depression of the key-levers. The position of thetappet on the escapementbar is such that the key-levers are lockedbefore the platen hasreached the extreme end of the line, thereby makingit possible to Write a. few more letters at the end of the line in orderIDO This trip-lever is pivoted on the rear ITC into itsinoperativeposition by a shifting-rod o, which is'pivoted at .its lower end to thelocking-plate eccentric to the pivot of the latter and provided in itsupper end with a longitudinal slot fu', whichreceives a screw orprojection o2 on the lower end of a restoring Y button or key o3. Thelatter is normally held y slot 'u' of the shifting-bar.

in an elevated position, with its screw or pro jectionvat the upper 'endof the slot in the shifting-bar, bya lifting-arm c4, pivotally confnecting ythe ,lower end of the restoring-key with theframe,- and aspring @5, connecting said arm with the frame. vVthen the lockingplateis raised into an operative'position, the shifting-bar is also raised,so that the pin of the restoring-key is in the lower end of the Upondepressing the restoring-key when the parts are in this position the pinof the key c3 bears against the lower end of the slot o and moves theshifting-bar downwardly, together with the locking-plate. As thelocking-plate is depressed it delects the main catch by engaging againstthe inclined upperV side thereof, and after passing below the latterthecatch is again moved forward by the spring into its normal position, sothat thev main' catch en-l Y ble to resume writing. In order to preventsuch an occurrence, an auxiliary catch w is provided, which holds ythelocking-plate in a depressed position when the main catch is f held in aretracted position by thetappet.

i ingly held in its foremost position on the main Theauxiliary'catch isvpreferably pivoted concentric .with the main catch and is arranged onthe opposite side of the pivot, so Y that when the main catchiswithdrawn fromand passing through a segmenatal slot 104 in I the maincatch. The auxiliary catch is yieldcatchby a springwi", secured to themain catch and bearing againstthe pin of the aux n iliary catch. t Theunder side'of the auxiliary i catch is lower than the' under' side ofthe 'the same.

main catch, so that upon retracting the latter for the purpose ofallowing the locking-plate to be raised into an operative position theauxiliary catch cannot pass with its flat under side over thelocking-plate and prevent itsrising. Ordinarily the main catch afterbeing withdrawn for releasing the' locking-plate immediately returns toits normal position into the path of the locking-plate, so that itcatches the latter upon being depressed. however, the main catch is heldin a retracted position by the tappeti, the locking-plate when depressedis caught by the auxiliary catch, which at this time is projected intothe path gf the locking-plate. When the tappet subsequently clears thetrip-lever, the main catch swings forward over the locking-plate and theauxiliary catch is retracted from above The tappet is pivoted on asupporting-block u and is held against turning in one direction whenengaging the trip-lever by a pin u', arranged on the block and engagingwith one end of a slot u2 in the tappet, and is yieldingly held againstmovement in the opposite direction to permit the tappet toride over thetrip-lever on the return movement ofthe'platen by a spring n3, securedto the block and bearing against the tappet. The supporting-blockis'adjustably secured lby a screw n4 to the escapement-bar, so as ipermit of varying the point at which the locking of the key-levers iseffected.

We claim as our inventionl.v The combination with the primary cai` riagehaving a longitudinal movement and provided in its cross bars `withhorizontal guideways, and the secondary carriage capable of longitudinaland transversemovement and provided in its cross-bars with bearingswhich are in line with said guideways, of a platen provided with a shaftjournaled in said b'earin gs and movable transversely along saidhorizontal guideways, a vertically-,swinging link connecting the primarycarriage and the secondary carriage, and a shifting device Whereby thesecondary carriage andthe platen are moved transversely in the primarycarriage, substantially as set forth.

2. rI he combination with the primary carriage having a longitudinalmovement and provided on its cross-bars with transverse Quideways, andthe secondary carriage having a transverse and a longitudinal movementand provided on its cross-bars with bearings,

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of a platen provided with a shaft which is f.

of swinging vertically independent thereof, a secondary carriage capableof longitudinal and transverse movement and provided on its cross-barswith bearings, a platen provided with a shaft which is journaled in saidbearings and which passes through transverse slots in the cross-bars ofthe primary carriage, rollers arranged ou the platen-shaft and ruimingon transverse tracks arranged lo on the cross-bars of the primarycarriage, a

rock-shaft extending concentrically through the pivot connecting theprimary carriage and the guide, rock-arms arranged on the rock-shaft,and links connecting said rockarms with the platen-shaft, substantiallyas set forth.

4. Thecombination wilh the main frame and the type-bars each of which isprovided with two letters, of a platen-carriage capable zo of alongitudinal and a transverse movement and also of an upward and adownward movement, a rock-shaft journaled in the upper part of the mainframe, a rock-arm mounted on the rock-shaft and provided with anupwardly-opening fork, a horizontal shiftprovided with a ratchet-wheel,of a ratchetlever provided with a fixed stop which engages with theratchet-wheel to limit the forward movement of said lever, a pawlpivoted on said lever and adapted to engage with the 4o teeth on theratchet-wheel for feeding the platen upon turning the lever, and anadjustable stop which is mounted on said lever and whereby the pawl iscaused to engage with the ratchet-wheel during a shorter or a longerportion of the throw of the lever, said adjustable stop being engaged bythe pawl while the latter is in its retracted position and disengagedfrom the ratchet-wheel but disengaged from the pawl while the latter isin 5o its projected position and in engagement with the ratchet-wheel,substantially as set forth.

6. In a type-writing machine, the combination with the rotary platenprovided with a ratchet-wheel, of a ratchet-lever provided with a pawladapted to engage with the teeth of the ratchet-wheel for turning theplaten, an adjusting-lever pivoted on the ratchet-lever and providedwith a stop which engages with said pawl, a projection arranged on the6o ratchet-lever, and a spring-plate arranged on the adjusting-lever andprovided with a number of notches which are adapted to receive saidprojection for holding the adjusting-le- Ver in postion, substantiallyas set forth.

7. The combination with the main frame,

' the platen-carriage, and the vertically-movable key-levers, of alocking-plate pivoted transversely to the main frame below thekeylevers, a spring whereby the locking-plate, when free, is turned upinto engagement with the under side of thekey-levers to prevent thedepression thereof, a horizontallymovable catch mounted on the mainframe and adapted to engage with the locking-plate for holding the samein a lowered or inoperative position, a vertically-swinging trip-leverpivoted on the frame and connected with the catch, and a tappet arrangedon the carriage and adapted to engage with the trip-lever for turningthe same and disengaging the catch from the locking-plate, substantiallyas set forth.

S. In a type-writing machine, the combination with the main frame, theplaten-carriage and the key-levers,of a locking-plate arrangedtransversely below the key-levers and pivoted to the main frame, aspring whereby the locking-plate is raised into engagement with theunder side of the key-levers, a main catch and an auxiliary catcharranged toengage alternately with the locking-plate and hold the samein a depressed position and intermediate` connecting mechanism wherebythe catches are controlled by the platen carriage, substantially as setforth.

9. In a type-writing machine, the combination with the main frame, theplaten-carriage and the key-levers,of a locking-plate arrangedtransversely below the key-levers and pivoted to the main frame, aspring whereby the locking-plate is raised into engagemerlt with theunder side of the key-levers, a main catch and an auxiliary catchpivoted concentrically and arranged on opposite sides of the pivot sothat the catches can be engaged alternately with thelocking-plate,aspringyieldingly connecting the catches so that one catch can turnindependently of the other catch, and intermediate connecting mechanismwhereby the catches are controlled by the platen-carriage, substantiallyas set forth.

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l0. Inatype-writing machine,the combination with the main frame, theplaten-'carriage transversely below the key-levers and pivoted to themain frame, a spring whereby the locking-plate is raised into engagementwith the under side of the key-levers, a restoring-key whereby thelocking plate is depressed, a catch whereby the locking-plate is heldina depressed position,and intermediate mechanism wherebyv theplaten-carriage disengages the catch from the locking-plate,substantially as set forth.

ll. In a type-writing machine the combination with the main frame, theplaten-carriage and the key-levers,of a locking-plate arrangedtransversely below the key-levers and pivoted to the main frame, aspring whereby the locking-plate is raised into engagement with theunder side of the key-levers, a shifting-bar pivoted at one end to thelocking-plate, a restoring-key provided with a projection engaging witha slot in the other end of the shifting-bar, a lifting-link connectedwith the restoring-key, a spring whereby the restoring- VVit'ness ourhands this 26th day of April,l key and lifting-link are raised, acatehWhere- 1898. i by the locking-plate is heldin adepressed po- HAROLDJARVIS.

` sition;and'iutermediate mechanism whereby MANLEY H.BLAKESLEE.

the movement of the platen-carriage disen- VitneSSeS: gages the catchfrom'the locking-plate, sub- CARL F. GEYER,

stantially as Set forth. THEO. L. POPE.

